Improvement in paper-cutting machines



UNITED STATES PATENT OFFICE.

JOHN E. COFFIN, OF PORTLAND, MAINE, ASSIGNOR TO FREDERICK W. BAILEY ANDJAMES NOYES, OF SAME PLACE.

IMPROVEMENT IN PAPER-CUTTING MACHINES.

Specification forming part of Letters Patent No. 110,631, dated January3, 1871. i

To all whom it may concern:

p Be it known that I, JOHN E. CoFFrN, of Portland, in the county ofCumberland and State of Maine, have invented a new and useful Machinefor Cutting Dimension-Paper; and I do hereby declare the following to bea full, clear, and exact description thereof, which will enable othersto make and use my invention,reference being had to the accompanyingdrawing, forming part of this speciiication, in which- Plate 1 shows aside elevation of one side of my machine. Plate 2 is a side elevation ofthe opposite side. Plate 3 is a front end elevation. Plate 4t is a topplan. vertical section. Plate 6 is a view of the inside of a portion ofmy machine to illustrate the method of moving the shears. Plate 7 is adetail to show the method of relieving the wear of the pawl upon theratchet a. Y

The general purpose of my invention is to provide a machine in whichdimension-paper may be cut by first divdingfthe same into l'ong stripsof such width as may be desired lby means of adjustable rotary cutters,and

then by cutting the said strips into pieces of such length as may berequired by means of the intermittent operation of the shears.

Y The operating parts of my machine are set in and attached to anappropriate frame, A.

In order to move the machine, power is applied to the shaft b, to whichis shown attached in the drawing the hand-wheel c. The shaft b isrepresented in Plate 3 as being broken out, in order to exhibit in therear of it the shaft e. Upon the shaft b is rigidly set the small gearf, matching the larger gear g, rigidly attached tor the shaft e. Uponthis shaft e are also rigidly attached the two cams d h. It will thusbeseen that by the revolution of the wheel c motion is conveyed to theshaft e and the two cams before mentioned.

The shafts b and e are appropriately mounted in the sides of the frameA, as illustrated in Plates l and 2.

On the back side of the machine near'the top, and set in the frame A inthe ordinary manner, are seen the two rolls 'i j. (See Plate 5.) Motionis communicated to these rolls as follows: A band, 7c, Plate 2, passingfrom the truck m on the shaft Z, is carried around the truck n, which isrigidly attached tothe shaft Plate 5 is aV o; and, on the opposite endof said shaft o, on the other side of the machine, Plate 1, there isanother truck, p, from which a' band, q, extends around the truck i",which is set on the same shaft as the roll jr The upper roll, i, ismoved by friction as the paper to be cut is inserted between these tworolls.

The method by which motion is imparted to the shaft l will be hereafterdescribed.

Next after the rolls t' j in the order of operation of the machine arethe shafts o t, Plate 5,

carrying'the rotary adjustable cutters s s. The 4 arrangement of theseis best exhibited in the top plan in .Plate 4, the set 's' beingarranged upon a shaft immediately underneath the shaft t, upon which theset s isarranged, so that their cutting-edges shall slightly overlap, inorder to more perfectly effectuate the cutting. They are all adjustableby set-screws a, which permit of the said cutters being moved toward orfrom eachother along the shafts t and o, and also holdl the same at anydesired position o n the shafts, according to the width into which thestrips'of paper are to be cut.

The method of rotating the shaft o has falready been described-towit,'by the band K, and the method of revolving the shaft tis seen inPlate l-to Wit,by means of the truck p, band c, and truck 1o. v

a: shows a large drum or roll, set on the shaft l, which shaft isrevolved by the following means Upon the shaft e, at oneextremitythereof, Plate l, is rigidly attached the crank g/,which hasthe pin z, working in the slot a of the sector b. Y the frame A, so as'to admit of its vibratory motion backward and forward, as impelled bythe crank y.

As the'shaft e is rotated, an intermittent reciprocating motion isimparted to the sector b. loose gear d' on the shaft l; but as the for-lward motion is imparted to the gear d it carries with it the arm e' andpawl e, which, striking the teeth of the ratchet a, revolves it, andwith it the drum or.

It will be perceived that only a partial revolution is imparted at eachtime to the drum .fo by the teeth of the sector, and that immediatelythereafter there is a short pause in the motion of the drum while thestud z is moving vertically in the slot a; also, that whilethe Thesectoi` is pivoted at c to The teeth of the sector match those of the lstud z is describing` the lower half of the circle in whichit moves, thepawl c" 1s revolving the ratchet c and drum and that while z is vdescribing the upper part of the circle in which it moves the pawl e" isbeing carried backward over the ratchet a, preparatory to againcommencing the forward movement. A

It is also evident that the pawl c" is carried back when the stud z isnearest the periphery of the sector, and isthcrefore carried backward bya more rapid movement than that which it imparts to the drum :t whenmoving forward.

Around the drum m, on shafts set into the frameof the machine, are seenthe small rolls j" g' It' fi', and, immediately in front of the cutterss', the small roll j'. The two rolls j' and f' serve to guide and directthe paper in its passage from the cutters s s', and the rolls g' It' i'confine the paper in place on the drum keep it even, and regulate itsmotion over the same.

This drum is cast hollowV and in two parts, and may be thus planed upona lathe, and the two parts then united. This is necessary, as it is ofVgreat importance that the surface of the drum should be as smooth aspossible, to allow the paper to pass over it evenly. Passing up over thedrum x, the paper then approaches the cutters k' Z', whose operationwill next be described. (See Plate 3 and Plate 6.) These Vcutters orshears k' Z' are operated by the two cams d and h, set upon the shaft e.The form of the cam or the path on the same is clearly seen at la inPlate 6.V vPivoted to the inside of the frame A at m', Plate 6, is thebell-crank lever a', with the stud o' working in the path on the cani h.Connected with a' at p' is the horizontal arm q', to which is attachedthe movable cutter Z'. The other cutter, 7c', isiiXe-d. Then the pin o'is reached by the part 9" ofthe cam, by the revolution of said cam theknife l' is drawn toward 7.x' at the proper time to cut the paperpassing between the two shears; but the order and succession oftheoperation of the various devices will be hereafter described.

` Attention is now directed to Plate 2, where is seen the truck t',rigidly set upon the shaft Z, which is thesame shaft as that upon whichthe drum .fr is fixed. Upon the shaft c is rigidly aflixed the cam u'.As the shaft e revolves and turns downward the cam a', it pushesdownward the pivoted arm t', pivotedV to the, frame4 of the machine atfr', and otherwise held slightly inclined upward by the coiled spring`y. Pivoted to t' is the vertical slotted arm fw', with the headed pin z'set into the frame of the machine and working in the slot. This arm isconnected with thetoggle l, which operates the two arms 4L 4, pivoted at2 2 to the frame of the machine, and having the curved or hooked ends 3to encompass and clamp the truck t' on the shaft Z.

Now, when the cam a' presses downward the arm e', as described, thehooked ends 3 clamp the truck t' and hold it stationary, and with it thedrum The object of' this is that the paper over the drum may not move orbe drawn while the shea-rs are operating upon it. As previouslyremarked, the pawl e", when passing backward over the ratchet a., islifted above the same, so as to avoid wear and the drum a', theprojection on the inner face of the cam 5 passes under the lower end,and at one side of the same, of the lever 6, causing` the lever to moveon its pivot 10, and thus slide the truck 7 up close to the inner faceof the ratchet a. This takes place immediately before the pawl c"commences to move backward over the ratchet a, and as it does so thepiece 9, attached to the spring-head of said pawl, being obliged to passover the periphery of the truck 7, Figs.1 and 2, Plate 7, thespring-head of the pawl is lifted out of the teeth of the rachet a, andso passes over the same. The upper end of the -levcr 6 is provided witha bifurcation to fit a small groove in the hub of the truck 7. (SeePlate 3, and Fig. 2, Plate 7.)

The genera-l operation of the machine may be thus described: The paper,entering the machine between the rolls t' y, passes between the cutterss s', where it is cut into strips, then under the roll f', then over thedrum a', and

between it and the small rolls g' h' fi', from which it passes downbetween the two cutters It' Z', and is there cut into lengths, as beforestated. v

The order and succession of the motions and operations of this machine,by which these effects are accomplished, are as follows: The

two rolls ij, the strippers s s', the rollsj' f' g' j n i', and the druma', all move simultaneously,

in order to carry the paper between the shears k' Z', that it may be cutinto pieces of the dc-` sired length. This length is regulated by theposition of the stud'z in the crank y, where it can be adjusted nearerto or farther from its center of revolution by means of the screw a2,

which moves a block in. a slot in the said crank y, into which block theshank of z is inserted. When the strippers, rolls, and drum have ceasedtheir motion the pins o' enter the parts o" ofthe cams a d, by which, asbefore described, the shears k' Z' are brought together and the paper iscut oif.

It may be well here to specify that there are two bell-cranks, a', oneforeach of the cams d h, as shown in Plate 3, `with arms like q'attached to each end of the moving cutter Z', both being of the sameconstruction, as illustrated in Plate 6.

While the shears are thus cutting the paper the pawl c" is movingbackward over the ratchet a, preparatory to again engaging the same tobring forward another length of the paper, when the same operation isrepeated.

If desired, the'arin q may be jointed near the center thereof, and thepart to which the knife l' is attached move on a horizontal track, sothat the knife l may move in a perfectly horizontal line, and beunaffected by the slight curvilinear motion described by the upper endof the bcll-crank u.

What I claim as my invention, and desire to secure by Letters Patent,is-

l. In the combination, consisting` of the crank1,the adjustable stud z,the sector b',

the gear d', the ratchet a, the paWl e, and the druin x, constructingthe sector b' With the crank-slot a', substantially as described.

2. The combination of the cam 5, the lever 6, and the truck 7, the piece9, and the pawl c, substantially as described.

3. The cam u', the arm e', and spring y', the arm w', toggle l, and thearms 4 3, in combination with the truck t on the shaft Z, as described.

JoIIN E. CONFIN.

v Witnesses: i

WILLIAM HENRY CLIFFORD, HENRY C. HoUsToN.

